Add HUD button that displays your SSS role and allies (#1895)

* Add button that displays your SSS role and allies

* Capitalize button name

* Add cases for 0, 1 and invalid number of allies

* Make the ally syncing system saner

Content.Shared/GameObjects/Components/Suspicion/SharedSuspicionRoleComponent.cs

@@ -0,0 +1,75 @@
+#nullable enable
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.GameObjects.Components.Suspicion
+{
+    public abstract class SharedSuspicionRoleComponent : Component
+    {
+        public sealed override string Name => "SuspicionRole";
+        public sealed override uint? NetID => ContentNetIDs.SUSPICION_ROLE;
+    }
+
+    [Serializable, NetSerializable]
+    public class SuspicionRoleComponentState : ComponentState
+    {
+        public readonly string? Role;
+        public readonly bool? Antagonist;
+
+        public SuspicionRoleComponentState(string? role, bool? antagonist) : base(ContentNetIDs.SUSPICION_ROLE)
+        {
+            Role = role;
+            Antagonist = antagonist;
+        }
+    }
+
+    [Serializable, NetSerializable]
+    public class SuspicionAlliesMessage : ComponentMessage
+    {
+        public readonly HashSet<EntityUid> Allies;
+
+        public SuspicionAlliesMessage(HashSet<EntityUid> allies)
+        {
+            Directed = true;
+            Allies = allies;
+        }
+
+        public SuspicionAlliesMessage(IEnumerable<EntityUid> allies) : this(allies.ToHashSet()) { }
+    }
+
+    [Serializable, NetSerializable]
+    public class SuspicionAllyAddedMessage : ComponentMessage
+    {
+        public readonly EntityUid Ally;
+
+        public SuspicionAllyAddedMessage(EntityUid ally)
+        {
+            Directed = true;
+            Ally = ally;
+        }
+    }
+
+    [Serializable, NetSerializable]
+    public class SuspicionAllyRemovedMessage : ComponentMessage
+    {
+        public readonly EntityUid Ally;
+
+        public SuspicionAllyRemovedMessage(EntityUid ally)
+        {
+            Directed = true;
+            Ally = ally;
+        }
+    }
+
+    [Serializable, NetSerializable]
+    public class SuspicionAlliesClearedMessage : ComponentMessage
+    {
+        public SuspicionAlliesClearedMessage()
+        {
+            Directed = true;
+        }
+    }
+}